KDTREE2 is a Fortran 95 module, and a parallel set of C++ classes which implement tree construction and search routines to find near neighbors in a data set.
The C++ implementation requires the STL as well as the BOOST C++ library be installed.

Numerikus is an attempt to build a set of numerical libraries written in C/C++, Fortran, Java and C# for single processor and multi-core processors. It wil have from basic functions to Linear Algebra solvers and ODE's and PDE's methods.

Open-GMF is an open Ground Water Modeling Framework for hydrogeologists and reservoir engineers. It is an extensible development environment for finite-difference, finite-element, and finite-volume models tailored to specific problems.

A user community and inclusive package of compatible routines available to diverse astronomy users. Application services to include astronomical lab control, image processing and amateur exploration that continues to adapt to meet a wide range of needs.

In many parallel scientific applications the process of grid generation, decomposition, message passing, and performance measurements are of similar stucture. The projects intention is to develop a generic function library that will contain all these.

RT is the world's fastest and most accurate simulation of astrophysical radiative transfer. RT includes C++ implementations of the Mersenne Twister and R250/521 RNGs, and the best-known BSP traversal algorithm.